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A block with mass m = 2.00 kg is placed against a spring on a frictionless incline with angle ? = 34°. (The block is not attached to the spring). The spring, with spring constant k = 19.8 N/cm, is compressed 15.7 cm and then released. What is the elastic potential energy of the compressed spring? What is the change in the gravitational potential energy of the block-Earth system as the block moves from the release point to its highest point on the incline? How far along the incline is the highest point from the release point?
Some object moves 220.0 m at an angle of 42° north of west. During this motion, a 68.0 N force acts on the same object, doing +5460.0 J of work on the object. what is this force's orientation
Block A with mass 3.72 kg travels with speed vi=3.74 m/s on a smooth horizontal surface and collides with a stationary block B whose mass is 2.29 kg. How much kinetic energy was lost in the collision
A 2.5 mm diameter copper wire carries a current of 33 A, uniformly distributed across its cross-section. Determine the magnetic field at the surface of the wire
A horse draws a sled horizontally on snow at constant speed. The horse can produce a power of 1.095 hp. What is the speed with which the sled moves across the snow
A coin is located 27.9 cm to the left of a converging lens (f = 20.0 cm). A second, identical lens is placed to the right of the first lens, Find the separation between the lenses
Consider an RLC circuit with R = 150? , L = 597mH , and C = 0.260?F, At what frequency is this circuit in resonance
A nuclear power plant has a reactor that produces heat at the rate of870MW. This heat is used to produce260MW of mechanical power to drive an electricalgenerator. What is the thermal efficiency of the plant
Two charged particles, Q1 = +4.90 nC and Q2 = -2.80 nC, are separated by 36.0 cm. What is the electrical potential energy of the pair
Assuming that the ram spring is oriented vertically and is still compressed by 1.17 10-2 m when the downward-moving ram hits the staple, find the speed of the ram at the instant of contact
A skater initially turning at 3.6 rev/sec slows down and stops in 4.2 seconds. How many revolutions does she make before stopping
A somewhat longer cable replaces the old and is attached to the steel bar 5 m from its upper end, connecting to the same place on the wall as before and maintaining the same angle between the bar and the wall.
A uniform plate of height 1.020 m is cut in the form of a parabolic section. Find the distance from the rounded tip of the plate to the center of mass
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